Secondary or storage battery.



Pam tented June 6, 1916.

HYVE/VTUR Bruce ZBTOZ mwvzsssa: KM

' ITTOR/Vfy UNITED, STATES PATENT OFFICE 1 BRUCE FORD, OF PHILADELPHIA, PENNSYLVANIA.

SECONDARY 0B STORAGE BATTERY.

Specification of Letters Ifatent.

Patented June 6, 1916.

Application filed March 2, 1914. Serial No. 821,888.

To all whom it may concern:

Be it known that I, BRUCE FORD, a citi-- zen of the United States, and a resident of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Secondary or Storage Batteries, of which the following is a specification.

The principal object of the present invenillustration in the accompanying drawings,

in which- Figure 1, is an elevation'al View, principally in section, of a connection embodying features of the invention, and Fig. 2, is a similar view drawn to an enlarged scale and illustrating features of the invention.

In the drawings 1 is a-leaden terminal -or post and it is provided with a flange 2.

3, is, a cover having an opening through which the terminal passes. i

4 is a asket between the flange and cover.

5 is a eaden nut on the projecting end of the terminal 1. The thread between the nut and the terminal has a slope'of substantially one in eight, as indicated in Fig. 2. In that figure 'several threads are shown, but the point is that the slope of the thread shall be substantially one in eight. The result of this is that although the parts can be drawn together to hold tight, the nut can be screwed on and off, which is not the case with lead when the angle of the thread is not substantially one in eight. Generally speaking if the nut be screwed onto a leaden member and an attempt is made to remove thenut,

it will not unscrew on the thread because the Y nut and member have, as it is called, frozen together. or become united and when the nut is'taken ofl, the thread is stripped and lost or destroyed. By the combination of the present invention the nut can be readily unscrewed and removed and replaced and screwed onagain, which is a matter of; 0b-

vious advantage.

The term leaden is intended to include mag I terials ordinarily used for the parts of lead storage batteries, as an alloy of lead and antimony.

What I claim is:

1. A detachable connection for a terminal and cover comprising the combination of-a leaden terminal having a flange, a cover having an opening through which the ter- 'minal passes, a leaden nut on the projecting end of the'terminal, and a thread between the nut and terminal of which the slope or angle is substantially one in eight, whereby the nut can be repeatedly unscrewed and screwed on and the parts .canbe made of the mater1al specified.

2. A detachable connection for a terminal and cover comprlsing the combination of a leadenterminal having a flange, a cover hav ing an opening through which the terminal passes, a gasket between the flange and-cover, a leaden nut on the projecting end of the terminal, and a multiplicity of threads between the nut and terminal of which the slope or angle is substantially one in eight, whereby the nut can be repeatedly unscrewed and screwed on and the parts'can bemade of the material specified.

3. .A connection for storagebattery parts or accessories comprising, in combination,

two leaden elements to be 'detachably con- I nected and a thread between them of which the slope or angle is substantially one in eight, whereby the elements can be repeatedly unscrewed and screwed and the parts can withstand corrosive conditions, substantially as described.

BRUCE FORD. Witnesses:

S. H. FLANDERS,

S. M. NronoL'As'. 

